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[Application of radionuclides in pharmaceutical fields].
1Laboratory of Drug Analysis, Showa Pharmaceutical University, Tokyo, Japan.
Summary
This study explores radionuclide applications in pharmaceuticals, developing diagnostic agents for kidney imaging and using radiolabeled compounds to trace drug metabolism and evaluate xenobiotic safety.
Area of Science:
- Pharmaceutical Sciences
- Nuclear Medicine
- Radiochemistry
Background:
- Radionuclides are crucial in pharmaceutical research, categorized by their emission type (gamma or beta).
- Applications include nuclear medicine diagnostics and tracer investigations for drug metabolism and safety.
Purpose of the Study:
- To develop novel radiopharmaceuticals for renal imaging.
- To investigate the metabolic fate and safety of various compounds using radiotracer techniques.
Main Methods:
- Synthesis and evaluation of technetium-99m labeled radiopharmaceuticals (99mTc-malic acid, 99mTc-dimercaptopropionic acid).
- Use of carbon-14 (14C) and tritium (3H) labeled compounds for in vivo and in vitro studies.
- Analysis of drug metabolism, xenobiotic safety, and chemical modifications of biomolecules.
Main Results:
- Two new radiopharmaceuticals demonstrated efficacy for renal imaging in preclinical and clinical studies.
- Metabolic pathways and safety profiles of thalidomide, norphenylephrine, and xenobiotics were elucidated.
- Carcinogen metabolism and the effects of a carcinostatic agent on biomolecules were investigated using tracer techniques.
Conclusions:
- Developed radiopharmaceuticals offer valuable diagnostic tools for nephro-urology.
- Radiotracer studies are essential for understanding drug disposition, safety, and the mechanisms of toxic or therapeutic agents.
- Standardization and purity testing of radiopharmaceuticals are vital for regulatory compliance.